U.S. equities held modest gains at midday Monday with the S&P 500 at 7,424.04 (+0.34%) and the Nasdaq Composite at 26,346.51 (+0.38%), as a semiconductor-led rally in names like Qualcomm (+7%), Micron (+5.6%), and Intel (+5.7%) offset macro headwinds from rising Iran-U.S. geopoli